Design of double-group IR zoom lens

Nanxi Wang; Bo Zhang; Xiaobai Jiang; Yuan Li; Wenli Kang; Yulan He; Hua Qiang

doi:10.1117/12.2199673

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8 October 2015 Design of double-group IR zoom lens

Nanxi Wang, Bo Zhang, Xiaobai Jiang, Yuan Li, Wenli Kang, Yulan He, Hua Qiang

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Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 96771E (2015) https://doi.org/10.1117/12.2199673
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

A 15× double-group linkage zoom lens was presented based on the 640×512 cooled FPA. Having two alternate components linked and moved together, double-group zoom structure has smoother cam curve, so the displacement of all components are smaller and the total length is shorter. The focal length rang is 30~450mm and wavelength is 3.7~4.8μm, F number is 4. This lens was placed at cold shield and 100% cold shield efficiency had reached. Moreover, detailed design and image quality were given by CODE V® optical software. After analysis, MTF approaches diffraction limit. The results show that this optical system has large zoom ratio, and excellent image quality.

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Nanxi Wang, Bo Zhang, Xiaobai Jiang, Yuan Li, Wenli Kang, Yulan He, and Hua Qiang "Design of double-group IR zoom lens", Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96771E (8 October 2015); https://doi.org/10.1117/12.2199673

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